[sotojuan]

> Facebook doesn't use ReactJS for Facebook. They use PHP to render HTML on the server.

This is false. Facebook is a huge user of React—it's one of their "pros" over Angular (which Google doesn't use as much).

The entire Instragram site is built with React, and all new development is with it[1], as well as parts of their existing UIs[2]. They are gradually replacing everything with it because redoing the whole site at once is impossible to do. They are also putting a ton of work into React Native and use it in some of their products [3].

Facebook seems to put some of their smartest engineers in the React and React Native teams as well as related projects like Immutable.js, and grab talent as quickly as they can (like Dan Abramov). It's silly to think that they're spending so much money on it for nothing.

[1] https://www.quora.com/Who-is-using-Facebook-React

[2] https://groups.google.com/forum/#!topic/reactjs/5K4fXu1aCTs

[3] https://facebook.github.io/react-native/showcase.html

[bsuh]

I didn't mean to imply Facebook doesn't use ReactJS at all. The point was they use it on a need by need basis, not all in SPA all the time.

[sotojuan]

Ah I see. Sorry for misreading. Still better than Angular's situation though, and I'd argue React Native is more important/more likely to be fully used at Facebook.